Form for concrete tanks.



W. J. McFARLAND.

FORM FOR CONCRETE TANKS.

APPLICATION FILED APR. 11, 1914.

1, 172,378, Patented Feb. 22, 1916.

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WILLIAM J. MOFARLAND, OF GRIFFITH, INDIANA.

FORM FOR CONCRETE ranks.

Application filed, April 11, 1914. Serial No. 831,124.

To all "whom it may concern:

Be it known that I, WILLIAM J. MoFAR- LAND, a citizen of the United States, anda resident of Griffith, county of Lake, and

State of Indiana, have invented certain new and useful Improvements in Forms for Concrete Tanks, of which the following is declared to be a full, clear, and exact description.

This invention relates to forms for use in constructing concrete tanks, and has for its main object to provide a simple form or mold of strong and substantial construction.

Another object is to provide a form or mold capable of lengthwise and crosswise adjustment for making tanks of different sizes.

Another object is to provide a light gage, metal form having reinforcing members arranged to permit of the expansion and contraction of the form.,

The invention consists in the several novel features of construction and arrangement hereinafter fully set forth and claimed.

The invention is clearly illustrated in the accompanying drawing in which:

Figure 1 is a plan of a form for tanks embodying the present invention; Fig. 2 is a side elevation thereof; Fig. 3 is a detail cross section taken on line 33 of Fig. 1; Fig. 4 is an end View of the form; Fig. 5 is a fragment of a reinforcing bar forming part of the structure; Fig. 6 is a detail horizontal section taken on lines 6--6 Fig. 2,

and Fig. 7 is a plan of a fragment of the form showing means for affording lateral expansion thereof.

In said drawings A, designates an-outer continuous wall and B, an inner continuous wall paralleling the outer wall and spaced away therefrom to leave a space equal to the thickness of the wall of the tank which is to be molded in the form. Each wall, as here shown, comprises four flat sheets 10, 10, 11, 11, of light gage metal,- one end of each sheet being bent into an arc of a circle of forty-five degrees, with the curved end of the sheet abutting against the curved end of the other to form a semi-circular end; said end portions are provided with angle iron bars 12, which are riveted thereto along the adjacent meeting edges of the end portions, and the two angle irons at each joint are bolted together by bolts and nuts 13. Said angle irons strengthen the bent end portions of the sheets, and other angle iron 1-1, are riveted to the sides of the sheets for reinforcing them along the sides.v

The'fiat portions of the sheets comprise the side wall portions of the form and the Specification of Letters Patent. Patented Feb,-22, 1916. I

two sheets of each side wall portion have a v sliding connection with each other to allow for the lengthening or shortening of the form. As shown one sheet of each of each wall is bent back upon itself along its upper and lower edges to form over-hanging lips or flanges15, that overlie the edge portions of the other sheet, whereby the two are held in close contact but may be moved lengthwise of each other to increase or decrease the length of the form.

To increase the width of the form, the i 2' bolts 13, are withdrawn, the two halves moved apartto the width of tank desired, and sheets or plates 16, are placed between the angle irons 12, as shown in Fig. 5, to

close the gap therebetween, after which the .angle irons 12 are bolted together by bolts 13.

The sides are reinforced by longitudinally extending angle iron bars 19, 20, each having a hook 21. on one end hooked into a slot 21, in the angle irons 1e, and the one angle iron 19 resting upon the other angle iron 20, and being bolted together by bolts and nuts 22. One flange of each angle iron is formed with spaced bolt holes 23, for the bolts, whereby the form may be extended or contracted as desired and the bolts 22, thrust through registering bolt holes in the angle irons. p

The sides are held in spaced relation by spacers, each comprising a rod or bar 17 extending transversely across the tops of the side walls, and downwardly projecting arms 18, slidably carried on each rod or bar, each arm having a set screw threaded therein and arranged to bear against the rod to hold the arms in place. The arms are adjusted along the rods to bring them a ainst the outer sides of the side wall reinforcements, after which the set screws are screwed up against the rods. v

In using the form in building up walls of tanks, the bottom portion of the tank is first molded; the form set up thereon at its edge, and concrete filled in before the bottom por tion has set in order to afford a perfect union between the bottom and walls. After the concrete has set, and form is removed from the wall by unbolting the curvedends of the form, removing the spacers, and with- IUO l. A form for concrete tanks comprising two endless, parallel sheet metal walls,

spaced apart, each wall comprising two similar halves, each consisting of two fiat,

side portions, the one telescoping ,upon the other, and having quarter round end portions abutting against quarter round end portions of the other half, angle iron bars riveted to said end. portions at their edges, bolts and nuts connecting said angle irons, and lengthwise extending reinforcement bars detachably secured upon the outer faces of said. side portions, and arranged in pairs, those of each pair overlapping each other and being bolted together.

2. A form for concrete tanks comprising two endless, parallel sheet metal Walls, spaced apart, each wall comprising two similar halves bolted together at the ends, each half consisting of two sheets, theone being adjustable lengthwise'upon the other and each having quadrant ends, upright reinforcing bars secured to the outer faces of the walls, and lengthwise extendingreinforcing bars detachably secured to said upright bars, and bolted together to form longitudinal reinforcements between the upright bars.

3.111 a form for concrete tanks, two parallel endless walls, each comprisingan endless, sheet metal wall consisting of two similar halves bolted together at their ends,

each half comprising two flat sheetsplaced side by side, the onesheet having bent edges overlapping the edges of the other sheet, and each sheet having one end bent into-the form of a quadrant abutting against the: curved end ofthe opposite sheet,- upright reinforcement members secured to the outer side of said. wall, and lengthwise extending reinforcing bars detachably secured to said" upright bars and extending therebetweeinx and having a plurality of .bolt holes for :the

reception of bolts for. bolting them together in different positions of adjustment.

4. In a form for concrete tankn'anendless, sheetmetal wall. formed of two'similar halves, each having a straight middle por tion curved end portions of quadrant form opposing each other, upright angle iron bars riveted to sald end portlons, ad acent their marginal edges intermedlate end p eces ex,-

tending between said angle iron bars, and

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

